Never inline C variadic functions

2020-11-11 00:00:00 +00:00
parent 66cadec176
commit 79d853ecce
2 changed files with 23 additions and 0 deletions
--- a/compiler/rustc_mir/src/transform/inline.rs
+++ b/compiler/rustc_mir/src/transform/inline.rs
@@ -206,6 +206,11 @@ impl Inliner<'tcx> {
        debug!("should_inline({:?})", callsite);
        let tcx = self.tcx;

+        if callsite.fn_sig.c_variadic() {
+            debug!("callee is variadic - not inlining");
+            return false;
+        }
+
        let codegen_fn_attrs = tcx.codegen_fn_attrs(callsite.callee.def_id());

        let self_features = &self.codegen_fn_attrs.target_features;